<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>天气案例</title>
    <script src="../js/vue.js"></script>
</head>

<body>
    <div id="root">
        <h2>今天天气很{{info}}</h2>
        <!-- <button @click="isHot=!isHot">切换天气</button> -->
        <button @click="changeWeather">切换天气</button>
    </div>
</body>
<script>
    Vue.config.productionTip = false
    const vm=new Vue({
        el: '#root',
        data: {
            isHot: true
        },

        computed: {
            info(){
                return this.isHot ? '炎热' : '寒冷'
            }
        },
        methods: {
            // changeWeather() {
            //     this.isHot = !this.isHot
            // }
        },


    })
</script>

</html>